METHOD OF DETERMINING COEFFICIENT OF ADHESION OF RAILWAY WHEEL TO RAIL AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2024 - IPC G01M17/10 G01N19/02 

FIELD: measurement technology.

SUBSTANCE: invention relates to method of determining coefficient of rolling stock wheel adhesion to rail. Method of determining coefficient of adhesion of railway wheel to rail includes rolling of wheel pairs of bogie, determination of speed of movement of bogie, measurement of normal load force on rails from bogie wheel pairs. In compliance with this invention, wheelset rpm is synchronized, note here that wheels of one of them have smaller diameter. Recording changes in the value of power circulation arising from partial slippage of the wheel pair with a smaller diameter of the wheels, determining the dependence of the power circulation value on the occurring force during sliding, after which the adhesion coefficient is calculated by the formula: where F_r is the reaction force on the body of the balance-swinging reduction gear, (N); r_p is the pitch circle radius of the balance-swinging reduction gear, (m); l_r is the distance from the point of occurrence of the force on the pitch circle of the reduction gear to the axis of its rotation, (m); l is the distance from the axis of rotation of the balance-swinging reduction gear to the point of application of the reaction force to the force-measuring sensor, (m); i_g is the gear ratio of the generator drive; R_s is radius of wheel of smaller diameter, (m); G_sw is part of the weight of the test bogie falling on the rails from the wheel pair with a smaller diameter of the wheels, (N); η is total efficiency of all reduction gears, test bogie and all axle box bearings. Invention also relates to a bogie for determining the coefficient of adhesion of a railway wheel to a rail using the above method.

EFFECT: as a result, it is possible to determine values of adhesion coefficients of railway wheels with rails at various loads on the wheel during movement both on straight and curved sections with different speeds and taking into account the effect of wheel slippage relative to the rail under different natural and climatic conditions.

2 cl, 2 dwg